The truck Mohamed Lahouaiej Bouhlel used for the Bastille Day attack in Nice, France.Getty Images

Mohamed Lahouaiej BouhlelSplash News

The Bastille Day terrorist hailed by ISIS as a “soldier of Islam” had bisexual flings — and his main male squeeze was a 73-year-old retiree, investigators have revealed.

French police officers discovered lurid photos of Mohamed Lahouaiej Bouhlel’s bisexual encounters on his mobile phone after they shot him dead in the cab of the truck he used to run over and kill 84 people and injure scores more on the Promenade des Anglais in Nice on Thursday.

The divorced father of three was a fitness fanatic and a regular on dating sites, hooking up with male and female lovers, while his “principal lover” was an elderly man, whose identity has not been released, according to multiple reports.

Bouhlel’s phone is chock full of racy messages, videos and photographs, including some that show him sleeping with his sexual conquests.

Investigators have used evidence from his phone to arrest seven suspects in connection with the Nice attack. Two Albanians believed to have supplied a pistol to Bouhlel are among the suspects currently in custody.

Bouhlel, 31, was known to send selfie photos to acquaintances, hang out at gyms and salsa bars and visit websites depicting mass executions, according to French-based BFM TV.

Mohamed Lahouaiej BouhlelAP

The sicko even used his phone to snap a selfie inside his rented truck moments before plowing through crowds of people enjoying the Bastille Day fireworks along the promenade. He sent the picture to family members in his native Tunisia.

On Sunday, several foreign news agencies reported that Bouhlel had been indoctrinated about two weeks ago by an Algerian member of the Islamic State group in Nice.

French officials could not confirm Monday that Bouhlel had been approached by an Algerian recruiter, saying that the investigation is ongoing.

One of Bouhlel’s former neighbors described him as a violent man who lashed out after his wife asked for a divorce.

“He defecated everywhere, he cut up his daughter’s teddy bear and slashed the mattress,” the neighbor told a French newspaper, The Local, adding, “I don’t think there was a radicalization issue, I think there was a psychiatric problem.”

see also

The driver’s uncle, Sadok Bouhlel, told the Associated Press that given Bouhlel’s family problems — he was estranged from his wife and three children — the Algerian recruiter “found in Mohamed an easy prey for recruitment.”

Bouhlel’s rapid radicalization has puzzled investigators. Friends and family said he had not been an observant Muslim in the past. Cazeneuve said Monday on RTL radio that the driver may have been motivated by ISIS messages but not necessarily coordinating with a larger network.

“Mohamed didn’t pray, didn’t go to the mosque and ate pork,” said Sadok Bouhlel, a 69-year-old retired teacher, in the driver’s hometown of Msaken, Tunisia. The uncle said he learned about the Algerian recruiter from extended family members who live in Nice.

On July 18, people gather at a makeshift memorial to observe a minute of silence to honor the victims of the Bastille Day attack in Nice, France.AP

Sadok is devastated by his nephew’s act, and doesn’t want him buried in Msaken.

“He made more than 80 families grieve, and stained the reputation of our town and our country,” he said.

Many of the dead and injured were children watching a fireworks display with their families. Cazeneuve said 59 people are still hospitalized, 29 of them in intensive care, out of 308 people injured overall.

France held a moment of silence Monday to remember the victims. Thousands of people massed on the waterfront promenade where the Bastille Day celebrations became a killing field on Thursday night.

Among the mourners was Prime Minister Manuel Valls, who was loudly booed as he arrived at and left the ceremony in Nice.

President François Hollande’s Socialist administration has come under blistering criticism from opposition conservatives after last week’s deadly attack.

Former President Nicolas Sarkozy accused the government of bad policies that he says failed to prevent three major attacks in the past 18 months.

Cazeneuve hit back Monday, listing a series of laws and extra police forces created under Hollande’s presidency “to face a threat that France was not prepared for” when he took over from Sarkozy in 2012.

After a special security meeting, Defense Minister Jean-Yves Le Drian said French forces in the US-led coalition struck IS targets again overnight and on Saturday.

French warplanes have been involved in the operation in Iraq and, to a lesser degree, in Syria.